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  1. // necessary header files
  2. #include <stdio.h>
  3. #include <string.h>
  4. #include <ctype.h>   // for char functions
  5. #include <stdlib.h>  // for malloc
  6.  
  7. // define constants
  8. #define STD_HOURS 40.0
  9. #define OT_RATE 1.5
  10. #define MA_TAX_RATE 0.05
  11. #define NH_TAX_RATE 0.0
  12. #define VT_TAX_RATE 0.06
  13. #define CA_TAX_RATE 0.07
  14. #define DEFAULT_TAX_RATE 0.08
  15. #define NAME_SIZE 20
  16. #define TAX_STATE_SIZE 3
  17. #define FED_TAX_RATE 0.25
  18. #define FIRST_NAME_SIZE 10
  19. #define LAST_NAME_SIZE 10
  20.  
  21. // Define a global structure type to store an employee name
  22. // ... note how one could easily extend this to other parts
  23. // parts of a name:  Middle, Nickname, Prefix, Suffix, etc.
  24. struct name
  25. {
  26.     char firstName[FIRST_NAME_SIZE];
  27.     char lastName [LAST_NAME_SIZE];
  28. };
  29.  
  30. // Define a global structure type to pass employee data between functions
  31. // Note that the structure type is global, but you don't want a variable
  32. // of that type to be global. Best to declare a variable of that type
  33. // in a function like main or another function and pass as needed.
  34.  
  35. // Note the "next" member has been added as a pointer to structure employee.
  36. // This allows us to point to another data item of this same type, 
  37. // allowing us to set up and traverse through all the linked 
  38. // list nodes, with each node containing the employee information below.
  39. struct employee
  40. {
  41.     struct name empName;
  42.     char taxState [TAX_STATE_SIZE];
  43.     long int clockNumber;
  44.     float wageRate;
  45.     float hours;
  46.     float overtimeHrs;
  47.     float grossPay;
  48.     float stateTax;
  49.     float fedTax;
  50.     float netPay;
  51.     struct employee * next;
  52. };
  53.  
  54. // this structure type defines the totals of all floating point items
  55. // so they can be totaled and used also to calculate averages
  56. struct totals
  57. {
  58.     float total_wageRate;
  59.     float total_hours;
  60.     float total_overtimeHrs;
  61.     float total_grossPay;
  62.     float total_stateTax;
  63.     float total_fedTax;
  64.     float total_netPay;
  65. };
  66.  
  67. // this structure type defines the min and max values of all floating
  68. // point items so they can be display in our final report
  69. struct min_max
  70. {
  71.     float min_wageRate;
  72.     float min_hours;
  73.     float min_overtimeHrs;
  74.     float min_grossPay;
  75.     float min_stateTax;
  76.     float min_fedTax;
  77.     float min_netPay;
  78.     float max_wageRate;
  79.     float max_hours;
  80.     float max_overtimeHrs;
  81.     float max_grossPay;
  82.     float max_stateTax;
  83.     float max_fedTax;
  84.     float max_netPay;
  85. };
  86.  
  87. // define prototypes here for each function except main
  88. struct employee * getEmpData (void);
  89. int isEmployeeSize (struct employee * head_ptr);
  90. void calcOvertimeHrs (struct employee * head_ptr);
  91. void calcGrossPay (struct employee * head_ptr);
  92. void printHeader (void);
  93. void printEmp (struct employee * head_ptr);
  94. void calcStateTax (struct employee * head_ptr);
  95. void calcFedTax (struct employee * head_ptr);
  96. void calcNetPay (struct employee * head_ptr);
  97. void calcEmployeeTotals (struct employee * head_ptr,
  98.                          struct totals * emp_totals_ptr);
  99.  
  100. void calcEmployeeMinMax (struct employee * head_ptr,
  101.                          struct min_max * emp_minMax_ptr);
  102.  
  103. void printEmpStatistics (struct totals * emp_totals_ptr, 
  104.                          struct min_max * emp_minMax_ptr,
  105.                          int theSize);
  106.  
  107. int main ()
  108. {
  109.  
  110.     // ******************************************************************
  111.     // set up head pointer in the main function to point to the
  112.     // start of the dynamically allocated linked list nodes that will be 
  113.     // created and stored in the Heap area.
  114.     // ******************************************************************
  115.     struct employee * head_ptr; // always points to first linked list node
  116.  
  117.     int theSize; // number of employees processed
  118.  
  119.     // set up structure to store totals and initialize all to zero
  120.     struct totals employeeTotals  = {0,0,0,0,0,0,0};
  121.  
  122.     // pointer to the employeeTotals structure
  123.     struct totals * emp_totals_ptr = &employeeTotals;
  124.  
  125.     // set up structure to store min and max values and initialize all to zero
  126.     struct min_max employeeMinMax = {0,0,0,0,0,0,0,0,0,0,0,0,0,0};
  127.  
  128.     // pointer to the employeeMinMax structure
  129.     struct min_max * emp_minMax_ptr = &employeeMinMax;
  130.  
  131.     // ********************************************************************
  132.     // Read the employee input and dynamically allocate and set up our 
  133.     // linked list in the Heap area.  The address of the first linked
  134.     // list item representing our first employee will be returned and
  135.     // its value is set in our head_ptr. We can then use the head_ptr 
  136.     // throughout the rest of this program anytime we want to get to get 
  137.     // to the beginning of our linked list.
  138.     // ********************************************************************
  139.  
  140.     head_ptr = getEmpData ();
  141.  
  142.     // ********************************************************************
  143.     // With the head_ptr now pointing to the first linked list node, we
  144.     // can pass it to any function who needs to get to the starting point
  145.     // of the linked list in the Heap.  From there, functions can traverse 
  146.     // through the linked list to access and/or update each employee.
  147.     //
  148.     // Important:  Don't update the head_ptr ... otherwise, you could lose
  149.     //             the address in the heap of the first linked list node.
  150.     //
  151.     // ********************************************************************
  152.  
  153.     // determine how many employees are in our linked list
  154.  
  155.     theSize = isEmployeeSize (head_ptr);
  156.  
  157.     // Skip all the function calls to process the data if there
  158.     // was no employee information to read in the input
  159.     if (theSize <= 0)
  160.     {
  161.         // print a user friendly message and skip the rest of the processing
  162.         printf("\n\n**** There was no employee input to process ***\n");
  163.     }
  164.  
  165.     else // there are employees to be processed
  166.     {    
  167.  
  168.         // *********************************************************
  169.         // Perform calculations and print out information as needed
  170.         // *********************************************************
  171.  
  172.         // Calculate the overtime hours
  173.         calcOvertimeHrs (head_ptr);
  174.  
  175.         // Calculate the weekly gross pay
  176.         calcGrossPay (head_ptr); 
  177.  
  178.         // Calculate the state tax                                       
  179.         calcStateTax (head_ptr);
  180.  
  181.         // Calculate the federal tax                                                   
  182.         calcFedTax (head_ptr);
  183.  
  184.         // Calculate the net pay after taxes   
  185.         calcNetPay (head_ptr); 
  186.  
  187.         // *********************************************************
  188.         // Keep a running sum of the employee totals
  189.         //
  190.         // Note the & to specify the address of the employeeTotals
  191.         // structure.  Needed since pointers work with addresses.
  192.         // Unlike array names, C does not see structure names
  193.         // as address, hence the need for using the &employeeTotals
  194.         // which the complier sees as "address of" employeeTotals
  195.         // *********************************************************
  196.         calcEmployeeTotals (head_ptr, 
  197.                             &employeeTotals);
  198.  
  199.         // *****************************************************************                                  
  200.         // Keep a running update of the employee minimum and maximum values
  201.         //
  202.         // Note we are passing the address of the MinMax structure
  203.         // *****************************************************************
  204.         calcEmployeeMinMax (head_ptr, 
  205.                             &employeeMinMax);
  206.  
  207.         // Print the column headers
  208.         printHeader();
  209.  
  210.         // print out final information on each employee
  211.         printEmp (head_ptr); 
  212.  
  213.         // **************************************************
  214.         // print the totals and averages for all float items
  215.         //
  216.         // Note that we are passing the addresses of the 
  217.         // the two structures
  218.         // **************************************************
  219.         printEmpStatistics (&employeeTotals, 
  220.                             &employeeMinMax, 
  221.                             theSize);
  222.     }
  223.  
  224.     // indicate that the program completed all processing
  225.     printf ("\n\n *** End of Program *** \n");
  226.  
  227.     return (0); // success
  228.  
  229. } // main
  230.  
  231. //**************************************************************
  232. // Function: getEmpData 
  233. // 
  234. // Purpose: Obtains input from user: employee name (first an last), 
  235. //          tax state, clock number, hourly wage, and hours worked
  236. //          in a given week.
  237. //
  238. //          Information in stored in a dynamically created linked
  239. //          list for all employees.
  240. //          
  241. // Parameters: void
  242. // 
  243. // Returns:
  244. //
  245. //    head_ptr - a pointer to the beginning of the dynamically
  246. //               created linked list that contains the initial
  247. //               input for each employee.
  248. //  
  249. //**************************************************************
  250.  
  251. struct employee * getEmpData (void)
  252. {
  253.  
  254.     char   answer[80];    // user prompt response
  255.     int    more_data = 1; // a flag to indicate if another employee
  256.                           // needs to be processed
  257.     char   value;         // the first char of the user prompt response
  258.  
  259.     struct employee *current_ptr,   // pointer to current node
  260.                     *head_ptr;      // always points to first node
  261.  
  262.     // Set up storage for first node   
  263.     head_ptr = (struct employee *) malloc (sizeof(struct employee));
  264.     current_ptr = head_ptr;
  265.  
  266.     // process while there is still input
  267.     while (more_data)
  268.     {
  269.  
  270.         // read in employee first and last name
  271.         printf ("\nEnter employee first name: ");
  272.         scanf ("%s", current_ptr->empName.firstName);
  273.         printf ("\nEnter employee last name: ");
  274.         scanf ("%s", current_ptr->empName.lastName);
  275.  
  276.         // read in employee tax state
  277.         printf ("\nEnter employee two character tax state: ");
  278.         scanf ("%s", current_ptr->taxState);
  279.  
  280.         // read in employee clock number
  281.         printf("\nEnter employee clock number: ");
  282.         scanf("%li", & current_ptr -> clockNumber);
  283.  
  284.         // read in employee wage rate
  285.         printf("\nEnter employee hourly wage: ");
  286.         scanf("%f", & current_ptr -> wageRate);
  287.  
  288.         // read in employee hours worked
  289.         printf("\nEnter hours worked this week: ");
  290.         scanf("%f", & current_ptr -> hours);
  291.  
  292.         // ask user if they would like to add another employee
  293.         printf("\nWould you like to add another employee? (y/n): ");
  294.         scanf("%s", answer);
  295.  
  296.         // check first character for a 'Y' for yes
  297.         // Ask user if they want to add another employee
  298.         if ((value = toupper(answer[0])) != 'Y')
  299.         {
  300.            // no more employees to process
  301.            current_ptr->next = (struct employee *) NULL;
  302.            more_data = 0; 
  303.         }
  304.         else // Yes, another employee
  305.         {
  306.            // set the next pointer of the current node to point to the new node
  307.            current_ptr->next = (struct employee *) malloc (sizeof(struct employee));
  308.            // move the current node pointer to the new node
  309.            current_ptr = current_ptr->next;
  310.         }
  311.  
  312.     } // while
  313.  
  314.     return(head_ptr);
  315. }
  316.  
  317. //*************************************************************
  318. // Function: isEmployeeSize
  319. //
  320. // Purpose: Traverses the linked list and keeps a running count
  321. //          on how many employees are currently in our list. 
  322. //
  323. // Parameters:
  324. //
  325. //   head_ptr - pointer to the initial node in our linked list
  326. //
  327. // Returns:
  328. //
  329. //   theSize - the number of employees in our linked list
  330. //
  331. //**************************************************************
  332.  
  333. int isEmployeeSize (struct employee * head_ptr)
  334. {
  335.  
  336.     struct employee * current_ptr; // pointer to current node
  337.     int theSize;                   // number of link list nodes
  338.                                    // (i.e., employees)
  339.  
  340.     theSize = 0; // initialize
  341.  
  342.     // assume there is no data if the first node does
  343.     // not have an employee name
  344.     if (head_ptr->empName.firstName[0] != '\0')
  345.     {
  346.  
  347.         // traverse through the linked list, keep a running count of nodes
  348.         for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  349.         {  
  350.  
  351.             ++theSize;  // employee node found, increment
  352.  
  353.         } // for
  354.     }
  355.  
  356.     return (theSize);  // number of nodes (i.e., employees)
  357.  
  358.  
  359. } // isEmployeeSize
  360.  
  361. //**************************************************************
  362. // Function: printHeader
  363. // 
  364. // Purpose: Prints the initial table header information.
  365. // 
  366. // Parameters: none
  367. // 
  368. // Returns: void
  369. //  
  370. //**************************************************************
  371.  
  372. void printHeader (void) 
  373. { 
  374.  
  375.     printf ("\n\n*** Pay Calculator ***\n");
  376.  
  377.     // print the table header
  378.     printf("\n--------------------------------------------------------------");
  379.     printf("-------------------");
  380.     printf("\nName                Tax  Clock# Wage   Hours  OT   Gross ");
  381.     printf("  State  Fed      Net");
  382.     printf("\n                   State                           Pay   ");
  383.     printf("  Tax    Tax      Pay");
  384.  
  385.     printf("\n--------------------------------------------------------------");
  386.     printf("-------------------");
  387.  
  388. } // printHeader
  389.  
  390. //************************************************************* 
  391. // Function: printEmp 
  392. // 
  393. // Purpose: Prints out all the information for each employee
  394. //          in a nice and orderly table format.
  395. // 
  396. // Parameters: 
  397. //
  398. //   head_ptr - pointer to the beginning of our linked list
  399. // 
  400. // Returns: void
  401. //  
  402. //**************************************************************
  403.  
  404. void printEmp (struct employee * head_ptr)
  405. {
  406.  
  407.     // Used to format the employee name
  408.     char name [FIRST_NAME_SIZE + LAST_NAME_SIZE + 1];
  409.  
  410.     struct employee * current_ptr; // pointer to current node
  411.  
  412.     // traverse through the linked list to process each employee
  413.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  414.     {
  415.         // While you could just print the first and last name in the printf
  416.         // statement that follows, you could also use various C string library
  417.         // functions to format the name exactly the way you want it.  Breaking
  418.         // the name into first and last members additionally gives you some 
  419.         // flexibility in printing.  This also becomes more useful if we decide
  420.         // later to store other parts of a person's name. I really did this just 
  421.         // to show you how to work with some of the common string functions.
  422.         strcpy (name, current_ptr->empName.firstName);
  423.         strcat (name, " "); // add a space between first and last names
  424.         strcat (name, current_ptr->empName.lastName);
  425.  
  426.         // Print out current employee in the current linked list node
  427.         printf("\n%-20.20s %-2.2s  %06li %5.2f  %4.1f  %4.1f %7.2f %6.2f %7.2f %8.2f",
  428.                name, current_ptr->taxState, current_ptr->clockNumber, 
  429.                current_ptr->wageRate, current_ptr->hours,
  430.                current_ptr->overtimeHrs, current_ptr->grossPay, 
  431.                current_ptr->stateTax, current_ptr->fedTax, 
  432.                current_ptr->netPay);
  433.  
  434.     } // for
  435.  
  436. } // printEmp
  437.  
  438. //*************************************************************
  439. // Function: printEmpStatistics 
  440. // 
  441. // Purpose: Prints out the summary totals and averages of all 
  442. //          floating point value items for all employees
  443. //          that have been processed.  It also prints
  444. //          out the min and max values.
  445. // 
  446. // Parameters: 
  447. //
  448. //   emp_totals_ptr - pointer to a structure containing a running total 
  449. //                    of all employee floating point items
  450. //
  451. //   emp_minMax_ptr - pointer to a structure containing
  452. //                    the minimum and maximum values of all
  453. //                    employee floating point items
  454. //
  455. //   theSize - the total number of employees processed, used 
  456. //             to check for zero or negative divide condition.
  457. // 
  458. // Returns: void
  459. //  
  460. //**************************************************************
  461.  
  462. void printEmpStatistics (struct totals   * emp_totals_ptr,
  463.                          struct min_max  * emp_minMax_ptr,
  464.                          int theSize)
  465. {
  466.  
  467.     // print a separator line
  468.     printf("\n--------------------------------------------------------------");
  469.     printf("-------------------");
  470.  
  471.     // print the totals for all the floating point items
  472.     printf("\nTotals:                         %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  473.            emp_totals_ptr->total_wageRate,
  474.            emp_totals_ptr->total_hours,
  475.            emp_totals_ptr->total_overtimeHrs,
  476.            emp_totals_ptr->total_grossPay,
  477.            emp_totals_ptr->total_stateTax,
  478.            emp_totals_ptr->total_fedTax,
  479.            emp_totals_ptr->total_netPay);
  480.  
  481.     // make sure you don't divide by zero or a negative number
  482.     if (theSize > 0)       
  483.     {
  484.         // print the averages for all the floating point items
  485.         printf("\nAverages:                       %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  486.                emp_totals_ptr->total_wageRate/theSize,
  487.                emp_totals_ptr->total_hours/theSize,
  488.                emp_totals_ptr->total_overtimeHrs/theSize,
  489.                emp_totals_ptr->total_grossPay/theSize,
  490.                emp_totals_ptr->total_stateTax/theSize,
  491.                emp_totals_ptr->total_fedTax/theSize,
  492.                emp_totals_ptr->total_netPay/theSize);
  493.  
  494.     } // if
  495.  
  496.     // print the min and max values for each item
  497.  
  498.     printf("\nMinimum:                        %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  499.            emp_minMax_ptr->min_wageRate,
  500.            emp_minMax_ptr->min_hours,
  501.            emp_minMax_ptr->min_overtimeHrs,
  502.            emp_minMax_ptr->min_grossPay,
  503.            emp_minMax_ptr->min_stateTax,
  504.            emp_minMax_ptr->min_fedTax,
  505.            emp_minMax_ptr->min_netPay);
  506.  
  507.     printf("\nMaximum:                        %5.2f %5.1f %5.1f %7.2f %6.2f %7.2f %8.2f",
  508.            emp_minMax_ptr->max_wageRate,
  509.            emp_minMax_ptr->max_hours,
  510.            emp_minMax_ptr->max_overtimeHrs,
  511.            emp_minMax_ptr->max_grossPay,
  512.            emp_minMax_ptr->max_stateTax,
  513.            emp_minMax_ptr->max_fedTax,
  514.            emp_minMax_ptr->max_netPay);
  515.  
  516.     // print out the total employees process
  517.     printf ("\n\nThe total employees processed was: %i\n", theSize);
  518.  
  519. }  // printEmpStatistics
  520.  
  521. //*************************************************************
  522. // Function: calcOvertimeHrs
  523. //
  524. // Purpose: Calculates the overtime hours worked by an employee
  525. //          in a given week for each employee.
  526. //
  527. // Parameters:
  528. //
  529. //   head_ptr - pointer to the beginning of our linked list
  530. //
  531. // Returns: void (the overtime hours gets updated by reference)
  532. //
  533. //**************************************************************
  534.  
  535. void calcOvertimeHrs (struct employee * head_ptr)
  536. {
  537.  
  538.     struct employee * current_ptr; // pointer to current node
  539.  
  540.     // traverse through the linked list to calculate overtime hours
  541.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  542.     {  
  543.         // Any overtime ?
  544.         if (current_ptr->hours >= STD_HOURS)
  545.         {
  546.             current_ptr->overtimeHrs = current_ptr->hours - STD_HOURS;
  547.         }
  548.         else // no overtime
  549.         {
  550.               current_ptr->overtimeHrs = 0;
  551.         }
  552.  
  553.     } // for
  554.  
  555. } // calcOvertimeHrs
  556.  
  557. //*************************************************************
  558. // Function: calcGrossPay
  559. //
  560. // Purpose: Calculates the gross pay based on the the normal pay
  561. //          and any overtime pay for a given week for each
  562. //          employee.
  563. //
  564. // Parameters:
  565. //
  566. //   head_ptr - pointer to the beginning of our linked list
  567. //
  568. // Returns: void (the gross pay gets updated by reference)
  569. //
  570. //**************************************************************
  571.  
  572. void calcGrossPay (struct employee * head_ptr)
  573. {
  574.  
  575.     float theNormalPay;   // normal pay without any overtime hours
  576.     float theOvertimePay; // overtime pay
  577.  
  578.     struct employee * current_ptr; // pointer to current node
  579.  
  580.     // traverse through the linked list to calculate gross pay
  581.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  582.     {
  583.         // calculate normal pay and any overtime pay
  584.         theNormalPay = current_ptr->wageRate * 
  585.                        (current_ptr->hours - current_ptr->overtimeHrs);
  586.         theOvertimePay = current_ptr->overtimeHrs * 
  587.                          (OT_RATE * current_ptr->wageRate);
  588.  
  589.         // calculate gross pay for employee as normalPay + any overtime pay
  590.         current_ptr->grossPay = theNormalPay + theOvertimePay;
  591.  
  592.     }
  593.  
  594. } // calcGrossPay
  595.  
  596. //*************************************************************
  597. // Function: calcStateTax
  598. //
  599. // Purpose: Calculates the State Tax owed based on gross pay
  600. //          for each employee.  State tax rate is based on the 
  601. //          the designated tax state based on where the
  602. //          employee is actually performing the work.  Each
  603. //          state decides their tax rate.
  604. //
  605. // Parameters:
  606. //
  607. //   head_ptr - pointer to the beginning of our linked list
  608. //
  609. // Returns: void (the state tax gets updated by reference)
  610. //
  611. //*************************************************************
  612.  
  613. void calcStateTax (struct employee * head_ptr)
  614. {
  615.  
  616.     struct employee * current_ptr; // pointer to current node
  617.     float tax_rate;
  618.  
  619.     // traverse through the linked list to calculate the state tax
  620.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  621.     {
  622.         // Make sure tax state is all uppercase
  623.         if (islower(current_ptr->taxState[0]))
  624.             current_ptr->taxState[0] = toupper(current_ptr->taxState[0]);
  625.         if (islower(current_ptr->taxState[1]))
  626.             current_ptr->taxState[1] = toupper(current_ptr->taxState[1]);
  627.  
  628.         // TODO - Add all the missing code to properly update the 
  629.         //        state tax in each linked list.  Right now each
  630.         //        employee is having their state tax set to zero,
  631.         //        regardless of taxState, which is not correct.
  632.         if (strcmp(current_ptr->taxState, "MA") == 0)
  633.             tax_rate = MA_TAX_RATE;
  634.         else if (strcmp(current_ptr->taxState, "NH") == 0)
  635.             tax_rate = NH_TAX_RATE;
  636.         else if (strcmp(current_ptr->taxState, "VT") == 0)
  637.             tax_rate = VT_TAX_RATE;
  638.         else if (strcmp(current_ptr->taxState, "CA") == 0)
  639.             tax_rate = CA_TAX_RATE;
  640.         else
  641.             tax_rate = DEFAULT_TAX_RATE;
  642.  
  643.         current_ptr->stateTax = current_ptr->grossPay * tax_rate;
  644.  
  645.     } // for
  646.  
  647. } // calcStateTax
  648.  
  649. //*************************************************************
  650. // Function: calcFedTax
  651. //
  652. // Purpose: Calculates the Federal Tax owed based on the gross 
  653. //          pay for each employee
  654. //
  655. // Parameters:
  656. //
  657. //   head_ptr - pointer to the beginning of our linked list
  658. //
  659. // Returns: void (the federal tax gets updated by reference)
  660. //
  661. //*************************************************************
  662.  
  663. void calcFedTax (struct employee * head_ptr)
  664. {
  665.  
  666.     struct employee * current_ptr; // pointer to current node
  667.  
  668.     // TODO - Add a for Loop to traverse through the linked list
  669.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  670.     {
  671.          // TODO - Inside the loop, using current_ptr
  672.          //        ... which points to the current employee
  673.          //        ... set the fedTax
  674.          current_ptr->fedTax = current_ptr->grossPay * FED_TAX_RATE;
  675.     }
  676.     // TODO - End the for loop       
  677.  
  678. } // calcFedTax
  679.  
  680. //*************************************************************
  681. // Function: calcNetPay
  682. //
  683. // Purpose: Calculates the net pay as the gross pay minus any
  684. //          state and federal taxes owed for each employee.
  685. //          Essentially, their "take home" pay.
  686. //
  687. // Parameters:
  688. //
  689. //   head_ptr - pointer to the beginning of our linked list
  690. //
  691. // Returns: void (the net pay gets updated by reference)
  692. //
  693. //*************************************************************
  694.  
  695. void calcNetPay (struct employee * head_ptr)
  696. {
  697.     float theTotalTaxes; // the total state and federal tax
  698.  
  699.     struct employee * current_ptr; // pointer to current node
  700.  
  701.     // traverse through the linked list to calculate the net pay
  702.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  703.     {
  704.         // calculate the total state and federal taxes
  705.         theTotalTaxes = current_ptr->stateTax + current_ptr->fedTax;
  706.  
  707.         // calculate the net pay
  708.         current_ptr->netPay = current_ptr->grossPay - theTotalTaxes;
  709.  
  710.     } // for
  711.  
  712. } // calcNetPay
  713.  
  714. //*************************************************************
  715. // Function: calcEmployeeTotals
  716. //
  717. // Purpose: Performs a running total (sum) of each employee
  718. //          floating point member item stored in our linked list 
  719. //
  720. // Parameters:
  721. //
  722. //   head_ptr - pointer to the beginning of our linked list
  723. //   emp_totals_ptr - pointer to a structure containing the 
  724. //                    running totals of each floating point
  725. //                    member for all employees in our linked
  726. //                    list
  727. //
  728. // Returns: 
  729. //
  730. //   void (the employeeTotals structure gets updated by reference)
  731. //
  732. //*************************************************************
  733.  
  734. void calcEmployeeTotals (struct employee * head_ptr,
  735.                          struct totals * emp_totals_ptr)
  736. {
  737.  
  738.     struct employee * current_ptr; // pointer to current node
  739.  
  740.     // traverse through the linked list to calculate a running 
  741.     // sum of each employee floating point member item
  742.     for (current_ptr = head_ptr; current_ptr; current_ptr = current_ptr->next)
  743.     {
  744.         // add current employee data to our running totals
  745.         emp_totals_ptr->total_wageRate += current_ptr->wageRate;
  746.         emp_totals_ptr->total_hours += current_ptr->hours;
  747.         emp_totals_ptr->total_overtimeHrs += current_ptr->overtimeHrs;
  748.         emp_totals_ptr->total_grossPay += current_ptr->grossPay;
  749.  
  750.         // TODO - update these two statements below to correctly 
  751.         //        keep a running total of the state and federal
  752.         //        taxes.  Right now they are incorrectly being 
  753.         //        set to zero.
  754.         emp_totals_ptr->total_stateTax += current_ptr->stateTax;
  755.         emp_totals_ptr->total_fedTax += current_ptr->fedTax;
  756.  
  757.         emp_totals_ptr->total_netPay += current_ptr->netPay;
  758.  
  759.         // Note:  We don't need to increment emp_totals_ptr
  760.  
  761.     } // for
  762.  
  763.     // no need to return anything since we used pointers and have
  764.     // been referencing the linked list stored in the Heap area. 
  765.     // Since we used a pointer as well to the totals structure,
  766.     // all values in it have been updated.
  767.  
  768. } // calcEmployeeTotals
  769.  
  770. //*************************************************************
  771. // Function: calcEmployeeMinMax
  772. //
  773. // Purpose: Accepts various floating point values from an
  774. //          employee and adds to a running update of min
  775. //          and max values
  776. //
  777. // Parameters:
  778. //
  779. //   head_ptr - pointer to the beginning of our linked list
  780. //   emp_minMax_ptr - pointer to the min/max structure
  781. //
  782. // Returns: 
  783. //
  784. //   void (employeeMinMax structure updated by reference)
  785. //
  786. //*************************************************************
  787.  
  788. void calcEmployeeMinMax (struct employee * head_ptr,
  789.                          struct min_max * emp_minMax_ptr)
  790. {
  791.  
  792.     struct employee * current_ptr; // pointer to current node
  793.  
  794.     // *************************************************
  795.     // At this point, head_ptr is pointing to the first
  796.     // employee .. the first node of our linked list
  797.     //
  798.     // As this is the first employee, set each min 
  799.     // min and max value using our emp_minMax_ptr
  800.     // to the associated member fields below.  They
  801.     // will become the initial baseline that we  
  802.     // can check and update if needed against the 
  803.     // remaining employees in our linked list.
  804.     // *************************************************
  805.  
  806.     // set to first employee, our initial linked list node
  807.     current_ptr = head_ptr;
  808.  
  809.     // set the min to the first employee members
  810.     emp_minMax_ptr->min_wageRate = current_ptr->wageRate; 
  811.     emp_minMax_ptr->min_hours = current_ptr->hours;
  812.     emp_minMax_ptr->min_overtimeHrs = current_ptr->overtimeHrs; 
  813.     emp_minMax_ptr->min_grossPay = current_ptr->grossPay;
  814.     emp_minMax_ptr->min_stateTax = current_ptr->stateTax;
  815.     emp_minMax_ptr->min_fedTax = current_ptr->fedTax;
  816.     emp_minMax_ptr->min_netPay = current_ptr->netPay;
  817.  
  818.     // set the max to the first employee members
  819.     emp_minMax_ptr->max_wageRate = current_ptr->wageRate; 
  820.     emp_minMax_ptr->max_hours = current_ptr->hours;
  821.     emp_minMax_ptr->max_overtimeHrs = current_ptr->overtimeHrs;
  822.     emp_minMax_ptr->max_grossPay = current_ptr->grossPay;
  823.     emp_minMax_ptr->max_stateTax = current_ptr->stateTax;
  824.     emp_minMax_ptr->max_fedTax = current_ptr->fedTax;
  825.     emp_minMax_ptr->max_netPay = current_ptr->netPay;
  826.  
  827.     // ******************************************************
  828.     // move to the next employee
  829.     //
  830.     // if this the only employee in our linked list
  831.     // current_ptr will be NULL and will drop out the 
  832.     // the for loop below, otherwise, the second employee
  833.     // and rest of the employees (if any) will be processed
  834.     // ******************************************************
  835.     current_ptr = current_ptr->next;
  836.  
  837.     // traverse the linked list
  838.     // compare the rest of the employees to each other for min and max
  839.     for (; current_ptr; current_ptr = current_ptr->next) 
  840.     {
  841.  
  842.         // check if current Wage Rate is the new min and/or max
  843.         if (current_ptr->wageRate < emp_minMax_ptr->min_wageRate)
  844.         {
  845.             emp_minMax_ptr->min_wageRate = current_ptr->wageRate;
  846.         }
  847.  
  848.         if (current_ptr->wageRate > emp_minMax_ptr->max_wageRate)
  849.         {
  850.             emp_minMax_ptr->max_wageRate = current_ptr->wageRate;
  851.         }
  852.  
  853.         // check if current Hours is the new min and/or max
  854.         if (current_ptr->hours < emp_minMax_ptr->min_hours)
  855.         {
  856.             emp_minMax_ptr->min_hours = current_ptr->hours;
  857.         }
  858.  
  859.         if (current_ptr->hours > emp_minMax_ptr->max_hours)
  860.         {
  861.             emp_minMax_ptr->max_hours = current_ptr->hours;
  862.         }
  863.  
  864.         // check if current Overtime Hours is the new min and/or max
  865.         if (current_ptr->overtimeHrs < emp_minMax_ptr->min_overtimeHrs)
  866.         {
  867.             emp_minMax_ptr->min_overtimeHrs = current_ptr->overtimeHrs;
  868.         }
  869.  
  870.         if (current_ptr->overtimeHrs > emp_minMax_ptr->max_overtimeHrs)
  871.         {
  872.             emp_minMax_ptr->max_overtimeHrs = current_ptr->overtimeHrs;
  873.         }
  874.  
  875.         // check if current Gross Pay is the new min and/or max
  876.         if (current_ptr->grossPay < emp_minMax_ptr->min_grossPay)
  877.         {
  878.             emp_minMax_ptr->min_grossPay = current_ptr->grossPay;
  879.         }
  880.  
  881.         if (current_ptr->grossPay > emp_minMax_ptr->max_grossPay)
  882.         {
  883.             emp_minMax_ptr->max_grossPay = current_ptr->grossPay;
  884.         }
  885.  
  886.         // TODO - Add code to check if the current state tax is our
  887.         //        new min and/or max items.   Right now the checks 
  888.         //        are missing.
  889.         if (current_ptr->stateTax < emp_minMax_ptr->min_stateTax)
  890.         {
  891.             emp_minMax_ptr->min_stateTax = current_ptr->stateTax;
  892.         }
  893.  
  894.         if (current_ptr->stateTax > emp_minMax_ptr->max_stateTax)
  895.         {
  896.             emp_minMax_ptr->max_stateTax = current_ptr->stateTax;
  897.         }
  898.  
  899.         // TODO - Add code to check if the current federal tax is our
  900.         //        new min and/or max items.   Right now the checks 
  901.         //        are missing.
  902.         if (current_ptr->fedTax < emp_minMax_ptr->min_fedTax)
  903.         {
  904.             emp_minMax_ptr->min_fedTax = current_ptr->fedTax;
  905.         }
  906.  
  907.         if (current_ptr->fedTax > emp_minMax_ptr->max_fedTax)
  908.         {
  909.             emp_minMax_ptr->max_fedTax = current_ptr->fedTax;
  910.         }
  911.  
  912.         // check if current Net Pay is the new min and/or max
  913.         if (current_ptr->netPay < emp_minMax_ptr->min_netPay)
  914.         {
  915.             emp_minMax_ptr->min_netPay = current_ptr->netPay;
  916.         }
  917.  
  918.         if (current_ptr->netPay > emp_minMax_ptr->max_netPay)
  919.         {
  920.             emp_minMax_ptr->max_netPay = current_ptr->netPay;
  921.         }
  922.  
  923.     } // for
  924.  
  925.     // no need to return anything since we used pointers and have
  926.     // been referencing all the nodes in our linked list where
  927.     // they reside in memory (the Heap area)
  928.  
  929. } // calcEmployeeMinMax
  930.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
Connie
Cobol
MA
98401
10.60
51.0
Y
Mary
Apl
NH
526488
9.75
42.5
Y
Frank
Fortran
VT
765349
10.50
37.0
Y
Jeff
Ada
NY
34645
12.25
45
Y
Anton
Pascal
CA
127615
8.35
40.0
N
stdout
copy 
Enter employee first name: 
Enter employee last name: 
Enter employee two character tax state: 
Enter employee clock number: 
Enter employee hourly wage: 
Enter hours worked this week: 
Would you like to add another employee? (y/n): 
Enter employee first name: 
Enter employee last name: 
Enter employee two character tax state: 
Enter employee clock number: 
Enter employee hourly wage: 
Enter hours worked this week: 
Would you like to add another employee? (y/n): 
Enter employee first name: 
Enter employee last name: 
Enter employee two character tax state: 
Enter employee clock number: 
Enter employee hourly wage: 
Enter hours worked this week: 
Would you like to add another employee? (y/n): 
Enter employee first name: 
Enter employee last name: 
Enter employee two character tax state: 
Enter employee clock number: 
Enter employee hourly wage: 
Enter hours worked this week: 
Would you like to add another employee? (y/n): 
Enter employee first name: 
Enter employee last name: 
Enter employee two character tax state: 
Enter employee clock number: 
Enter employee hourly wage: 
Enter hours worked this week: 
Would you like to add another employee? (y/n): 

*** Pay Calculator ***

---------------------------------------------------------------------------------
Name                Tax  Clock# Wage   Hours  OT   Gross   State  Fed      Net
                   State                           Pay     Tax    Tax      Pay
---------------------------------------------------------------------------------
Connie Cobol         MA  098401 10.60  51.0  11.0  598.90  29.95  149.73   419.23
Mary Apl             NH  526488  9.75  42.5   2.5  426.56   0.00  106.64   319.92
Frank Fortran        VT  765349 10.50  37.0   0.0  388.50  23.31   97.12   268.07
Jeff Ada             NY  034645 12.25  45.0   5.0  581.88  46.55  145.47   389.86
Anton Pascal         CA  127615  8.35  40.0   0.0  334.00  23.38   83.50   227.12
---------------------------------------------------------------------------------
Totals:                         51.45 215.5  18.5 2329.84 123.18  582.46  1624.19
Averages:                       10.29  43.1   3.7  465.97  24.64  116.49   324.84
Minimum:                         8.35  37.0   0.0  334.00   0.00   83.50   227.12
Maximum:                        12.25  51.0  11.0  598.90  46.55  149.73   419.23

The total employees processed was: 5


 *** End of Program ***
https://ideone.com/1i7rGZ
language:
C (gcc 8.3)
created:
10 days ago
visibility:
public

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